feat: enhance GeneralSettingsPage with tag management

- Added tag management functionality to the `GeneralSettingsPageClient`, including filtering, sorting, and CRUD operations for tags.
- Integrated a modal for creating and editing tags, improving user experience in managing task labels.
- Updated the `Header` component to replace the 'Tags' link with 'Manager'.
- Removed the deprecated `TagsPage` and `TagsPageClient` components to streamline the codebase.
- Adjusted data fetching in `page.tsx` to include initial tags alongside user preferences.

src/app/settings/general/page.tsx

@@ -1,4 +1,5 @@
 import { userPreferencesService } from '@/services/user-preferences';
+import { tagsService } from '@/services/tags';
 import { GeneralSettingsPageClient } from '@/components/settings/GeneralSettingsPageClient';
 
 // Force dynamic rendering for real-time data
@@ -6,7 +7,10 @@ export const dynamic = 'force-dynamic';
 
 export default async function GeneralSettingsPage() {
   // Fetch data server-side
-  const preferences = await userPreferencesService.getAllPreferences();
+  const [preferences, tags] = await Promise.all([
+    userPreferencesService.getAllPreferences(),
+    tagsService.getTags()
+  ]);
 
-  return <GeneralSettingsPageClient initialPreferences={preferences} />;
+  return <GeneralSettingsPageClient initialPreferences={preferences} initialTags={tags} />;
 }